2 layers104.1 × 96.5 mm

RAMBoard
chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines
30 parts2MIT
Boards in 1 GitHub repository, designed in KiCad, that use the CD74HCT30E by Texas Instruments (-55℃~+125℃ 1 100mV、260mV 28ns@4.5V,50pF 2V 2uA 3.98V、4.4V 4.5V~5.5V 4mA 4mA 74HCT Series 8 800mV NAND Gate Push-pull TTL Compatible CMOS PDIP-14 Logic Gates ROHS). See how each wires it, with its parts, size, README and files; the CD74HCT30E’s symbol, footprint and pinout are on its own page.

chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines